78 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Previously apparently known only from Ogilby's^description, based 

 on an example but 75 mm. long in the Queensland Museum. This 

 species appears to be distinct from Chaetodon pjeheius in the presence 

 of the dark blotch on the caudal peduncle. 



958. Langao Point. June 24, 1909. Length 98 mm. 



3612. Maculabo Island. June 13, 1909. Length 86 mm. 



387. Near Palag Bay, Luzon. June 16, 1909. Length 110 mm. 



489, 1152 [1640]. Porongpong Island. June 11, 1909. Length 114 to 130 mm. 

 Pale silvery yeUow, dusky stripe through each row of scales. Brown or black 

 ocular band wide as pupil, margined each side by blue white line. Tip of 

 snout and chin dusky orange. Postocular region with brown spots, continu- 

 ation of dusky body stripes. On upper side, between fourth and tenth dusky 

 stripes large black or very dark blue blotch extending very shghtly behind 

 shoulder to near base of anterior soft dorsal rays; through this blotch dusky 

 stripes become bright blue and continue as such till above gill opening; next 

 stripe immediately under blotch similar. Black spot on upper half of caudal 

 peduncle crosses top in axil of dorsal, bordered below by bluish white line. 

 Fins body color, edge of soft dorsal hyaline and brown; both dorsal and anal 

 more or less dusky terminally; dorsal spines dusky yellow, membranes clearer 

 and brighter. Terminal third of caudal dusky hj^aline, adjoining yellow much 

 dusted. Pectoral dusky hyaline, yellowish at base. Ventral uniform yellow. 



884. Port Galera, Mindoro. June 9, 1908. Length 120 mm. [658]. 



2875. Nan Wan, Formosa. Length 142 mm. 



CHAETODON PLEBEIUS Cuvier 



Chaetodon plebcius (Broussonet) Cuvier, Hist. Nat. Poiss., vol. 7, 1831, p. 

 68. South Sea. 



Chaetodon plebejiis Gxjnther, Cat. Fish. Brit. Mus., vol. 2, 1860, p. 5 (no 

 locality); Journ. Mus. GodeflFroy, vol. 2-3, Heft 5-6, 1874, p. 35, pi. 32, fig. 

 B (South Sea).— Day, Fishes of India, pt. 1, 1875, p. 104, pi. 26, fig. 3 

 (British Museum example). — Macleay, Proc. Linn. Soc. New South 

 Wales, vol. 5, 1881, p. 390 (Sue Island, Torres Strait, Queensland). — Day, 

 Fauna Brit. India, vol. 2, 1889, p. 3.— Ahl, Arch. Naturg., vol. 89, abth. 

 A, Heft 5, 1923, p. 54 (Viti Island; New Guinea). 



D. XIV, 17 to 19; A. IV or V, 15 to 17. Scales 43 to 45. Yel- 

 low. Dark ocular band and large ellipsoid blackish blotch below 

 last dorsal spines and front of soft dorsal. No dark blotch on 

 caudal peduncle. Length 100 mm. 



East Indies, Formosa, Queensland and Polynesia. 



CHAETODON DECORATUS Ahl 



Chaetodon decoratus Ahl, Arch. Naturg., vol. 89, abth. A, Heft 5, 1923, p. 71, 

 pi. 1, fig. 6. Yokohama, Japan. 



Apparently closely related to Chaetodon semeion but with a black 

 band across caudal peduncle. Though the following formula is 

 given it is not sufficiently distinct from the variations of our materi- 

 als of Chaetodon semeion. 



Scales 35 laterally, 6 above, 13 below. D. XIV, 22; A. Ill, 20. 



